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  Facile synthesis of high-surface area platinum-doped ceria for low temperature CO oxidation

Gatla, S., Aubert, D., Flaud, V., Grosjean, R., Lunkenbein, T., Mathon, O., et al. (2018). Facile synthesis of high-surface area platinum-doped ceria for low temperature CO oxidation. Catalysis Today. doi:10.1016/j.cattod.2018.06.032.

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Gatla, Suresh1, Autor
Aubert, Daniel2, Autor
Flaud, Valérie3, Autor
Grosjean, Rémi2, Autor
Lunkenbein, Thomas4, Autor           
Mathon, Olivier1, Autor
Pascarelli, Sakura1, Autor
Kaper, Helena2, Autor
Affiliations:
1ESRF – The European Synchrotron, 71, avenue des Martyrs, 38000 Grenoble, France, ou_persistent22              
2Laboratoire des Synthèses et Fonctionnalisation des Céramiques, UMR 3080, CNRS/Saint-Gobain CREE, 550, Ave Alphonse Jauffret, 84306 Cavaillon, France, ou_persistent22              
3Institut Charles Gerhardt, UMR 5253, Université Montpellier 2, Place Eugène Bataillon, 34095 Montpellier Cedex 5, France, ou_persistent22              
4Inorganic Chemistry, Fritz Haber Institute, Max Planck Society, ou_24023              

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 Zusammenfassung: Using a simple slow decomposition method of nitrate precursors, high-surface area platinum-doped ceria with a crystallite size of 9 nm can be prepared. The catalytic performance of the compound can be tuned by changing the reduction temperature under hydrogen (300 °C, 500 °C and 700 °C). The catalyst treated at 300 °C shows the best catalytic performance, being active at room temperature. The materials were analysed using a combination of structural characterization methods (X-ray diffraction (XRD), nitrogen physisorption, high angle annular dark field scanning transmission electron microscopy (HAADF-STEM)), surface sensitive methods (X-ray photoelectron spectroscopy (XPS), H2-chemisorption and H2-temperature-programmed reduction (TPR)) and X-ray absorption fluorescence spectroscopy (XAFS). HAADF-STEM and XAFS analysis suggests successful doping of platinum in the ceria lattice. After pretreatment at 300 °C, the situation is slightly different. While no defined platinum nanoparticles can be identified on the surface, some platinum is in a reduced state (XPS, H2-chemisorption).

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Sprache(n): eng - English
 Datum: 2017-12-182018-06-152018-06-23
 Publikationsstatus: Online veröffentlicht
 Seiten: 30
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: Expertenbegutachtung
 Identifikatoren: DOI: 10.1016/j.cattod.2018.06.032
 Art des Abschluß: -

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Titel: Catalysis Today
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: Amsterdam : Elsevier
Seiten: - Band / Heft: - Artikelnummer: - Start- / Endseite: - Identifikator: ISSN: 0920-5861
CoNE: https://pure.mpg.de/cone/journals/resource/954925564669